From: Bich Hemon <bich.hemon@xxxxxx>
alias definition in the device tree is mandatory
for each port.
Signed-off-by: Gerald Baeza <gerald.baeza@xxxxxx>
---
drivers/tty/serial/stm32-usart.c | 6 ++++--
drivers/tty/serial/stm32-usart.h | 2 +-
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 50948f6..c6ae4fd 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -696,8 +696,10 @@ static struct stm32_port *stm32_of_get_stm32_port(struct platform_device *pdev)
return NULL;
id = of_alias_get_id(np, "serial");
- if (id < 0)
- id = 0;
+ if (id < 0) {
+ dev_err(&pdev->dev, "failed to get alias id, errno %d\n", id);
+ return NULL;
+ }
if (WARN_ON(id >= STM32_MAX_PORTS))
return NULL;
diff --git a/drivers/tty/serial/stm32-usart.h b/drivers/tty/serial/stm32-usart.h
index 9f0d0e8..33f1320 100644
--- a/drivers/tty/serial/stm32-usart.h
+++ b/drivers/tty/serial/stm32-usart.h
@@ -206,7 +206,7 @@ struct stm32_usart_info stm32f7_info = {
#define USART_ICR_CMCF BIT(17) /* F7 */
#define STM32_SERIAL_NAME "ttyS"
-#define STM32_MAX_PORTS 6
+#define STM32_MAX_PORTS 8
#define RX_BUF_L 200 /* dma rx buffer length */
#define RX_BUF_P RX_BUF_L /* dma rx buffer period */
--
1.9.1
--
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